Coupling



Patented @et i0, i933 UNTE STTS PATENT @FFEQE CGlUPlLliNG Gerald S. Rogers, Pittsburgh, lila. Application May 7, i932. Serial N @39,8% I

` claims. (ci. :aes- 95) My invention relates to a coupling and, in ple 23 extending through the open end of the cap particular to a coupling adapted for making con- 2l has a threaded end for attachment to a conduit nection between a source of nuid such as a lubri- 24 and an enlarged hemispherical head 25 seated cant, under pressure, and a receptacle or fitting on the surface 22 concentric therewith. A sealing 5 designed to receive the uid. gasket 26 is disposed between the head 25 and the 60 Although numerous types of couplings have cap 21. The conduit 24 preferably is connected been known and used heretofore, many of such to a source of iluid, such as a lubricant of any couplings are characterized by complexity of condesired character, to which pressure may be struction, high cost of manufacture, and diiiiculty applied.

lo of maintenance for continued operation. Itis an The nipple 23 has a bore 27 opening into an 65 object of the invention, therefore, to 'improve enlarged cylindrical recess or chamber 28. A generally upon the construction of couplings oi nozzle 29 is positioned in said recess and is backed the type mentioned and to produce afdevice of this up by a spring 30. character which is simple in construction, can A collar 31 is seated in an enlarged'portion 32 be manufactured cheaply, and used by an unof the bore 11 in the barrel 10, and a tube 33 70 skilled operator without the danger c failure extends through the collar 31. The tube 33 has during use. one end swaged outwardly at 34 to form a seat It is a further object of the invention to profor a hemispherical tip 35 0n the nOZZle 29 00nvide a coupling permitting universal movement centric with the recess 22 and head 25. The other relative to one of the conduits associated thereend of the tube engages a perforated piston recip- 'Z5 with. rocable in the bore 11. The piston comprises a For a complete understanding of the invencup washer 36 backed up by a disc 37. tion, reference is made to the accompanying When the fitting 1.5 is separated from the coudrawing illustrating a present preferred embodipling, the Spring 30 advances the nOZZle 29 and ment. the tube 33 until the cup washer 36 engages the 80 In the drawing2 shoulder 13 in the bore 11. The ball closure 17 Figure l is a side elevation of the invention 0f the fitting, of course, engages its seat firmly associated with a fluid delivering conduit and a when removed from the coupling.

fluid receptacle or lubricant fitting; When the tting is inserted in the coupling or Figure 2 is a longitudinal section through the rather when the coupling iS applied U0 the lfting, 85 coupling; the end or nose of the shell 16 engages the cup Figures 3 and 4. are sectional views taken subwasher 36 and forces the tube 33 and the nozzle stantially along the same line of Figure 2, looking 29 backward against the force of the spring 30. in the direction indicated by the correspondingly The engagement 0f the Washer 36 With the C10- numbered arrows, and sure 17 opens the latter, although it normally 90 Figure 5 is a tview similar to Figure 2 showing closes the opening in the washer. If pressure is a modiiied form of construction. applied to the fluid in the conduit 24, it will ad- Referring in detail to the drawing, the coupling Vance through the nipple 23, the nozzle 29, the comprises a barrel 10 having an axial bore 11 and tube 33, and the Washer 36. The fluid will then 40 a reduced threaded shoulder 12. A portion of displace the ball 17 and enter the tubular shell 95 the bore 11 is of reduced diameter forming a 16. As soon as the pressure is released, the ball shoulder at 13. Bayonet slots 14 are formed in 17 again closes the hole in the washer 36. the unthreaded end of the barrel 10 for coopera- A fluid-tight seal is maintained by the engagetion with a pin tting 15 which is described in ment of the washer 36 with the end of the shell greater detail and claimedinmy copending appli- 16. The ange of the cup washer 16, further- 100 cattion, Serial No. 609,843, led May/7; 1932, for more, prevents leakage of fluid between the Lubricating fitting. Briey, the fitting comprises barrel 10 and the washer. The threaded joint a tubular shell 16 in one end of which is seated a between the cap 21 and the barrel l0 is fluidball closure 17. Pins 18 are inserted from oppotight and the gasket in the cap 21 makes a iiuidsite sides of the shell. 'A sleeve 19 is forced into tight joint with the head 25 of the nipple 23. 105 the shell and a spring 20 seated on the sleeve urges Universal movement of the nipple with respect to the ball closure toward its seat. the rest of the coupling, however, isfpermitted, A knurled cap 21 which is threaded so as to but since all the joints and connections are fluidscrew on the shoulder l2 of the barrel 10 has a tight, no leakage can occur. hemispherical surface 22 formed therein. A nip- In a modified form of the invention, a barrel im 40 has an axial bore 41, a shoulder 42, and a nose 43 for receiving a itting such as that shown at 15. A cap 44 is threaded on to the barrel. A

nipple 45 having a flange 46 is seated in a recess 5 in the cap and is threaded to a conduit 47. A

spring 48 normally seats the flange 46 against the end Wall of the cap 44.

A spring 49 seated in the bore of the nipple 45 normally urges a tube 50 and a piston including a cup washer 51 and back-up disc 52 against the shoulder 42.

The operation of the modification of Figure 5 is similar to that of the embodiment already described. The principal difference is in the details of construction permitting universal movement of the nipple with respect to the coupling. In the form of the invention shown in Figure 5, universal movement of the nipple necessitates tilting of the axis thereof so that the flange 46 leaves the end wall of the collar 44, except for one point of tangency. The spring 49 is likewise compressed slightly. A gasket 53 between the ange 46 and the end wall of the collar 44 maintains the joint therebetween huid-tight.

It will be apparent from the foregoing description that the invention provides a coupling for uid lines which is characterized by numerous advantages. The simplicity of construction will be obvious on inspection of the drawing and the comparatively low cost of manufacture is readily deducible therefrom. The construction, furthermore, is Very rugged, so that a long, useful life is assured without the annoyance of maintenance difficulties. All the joints in the coupling are permanently fluid-tight, although universal movement of the inlet nipple is permitted. The coupling also makes a tight joint with the fitting to which it is attached. At the same time, the flow of the uid through the coupling is substantially unimpeded.

Although I have illustrated and described herein but a single preferred embodiment of the invention, together With a modicaiton thereof, the

invention may, of course, be embodied in other forms than that shown within the scope of the appended claims.

I claim:

1. In a coupling, a barrel, a perforate piston therein adapted to engage a tubular member inserted into one end of the barrel, a cap on the other end of the barrel having a hemispherical seat therein, a nipple extending into the cap and having a hemispherical enlarged portion engaging said seat, a tube including a universal joint extending from said portion to said piston, and a spring for urging the tube against said piston.

2. In a coupling, a barrel, a perforate piston therein adapted to engage a tubular member inserted into one end of the barrel, a cap on the other end of the barrel having a seat therein, a nipple extending into the cap and having an enlarged portion engaging said seat, a tube extending from said portion to said piston, and a spring for urging the tube against said piston.

3. In a coupling, a barrel, a perforate pison therein adapted to engage a tubular member in serted into one end of the barrel, a cap on the other end of the barrel, a nipple extending into 100 the cap, a jointed tube extending from the nipple to the piston, and a spring tending to move the nipple against the cap and the tube against the piston.

4. In a coupling, a barrel, a perforate piston 105 therein adapted to engage a tubular member inserted into one end of the barrel, a cap on the other end of the barrel, a nipple extending into the cap, a tube extending from the nipple to the piston, and a spring tending to move the nipple 11() against the cap and the tube against the piston.

5. In a coupling, a barrel, a perforate piston reciprocable therein, a nipple extending into the barrel and movable universally relative thereto,

a tube extending from the nipple to the piston, 11F and a spring for moving the tube against the piston.

GERALD S. ROGERS. 

